diff --git a/src/.gitignore b/src/.gitignore
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -3,10 +3,11 @@
 package-lock.json
 public/css/app.css
 public/hot
-public/js/app.js
+public/js/*.js
 public/storage/
 storage/*.key
 storage/export/
+tests/report/
 vendor
 .env
 .env.backup
diff --git a/src/app/Auth/SecondFactor.php b/src/app/Auth/SecondFactor.php
--- a/src/app/Auth/SecondFactor.php
+++ b/src/app/Auth/SecondFactor.php
@@ -227,8 +227,6 @@
      */
     public function read($key)
     {
-        \Log::debug(__METHOD__ . ' ' . $key);
-
         if (!isset($this->cache[$key])) {
             $factors = $this->getFactors();
             $this->cache[$key] = isset($factors[$key]) ? $factors[$key] : null;
diff --git a/src/app/Backends/LDAP.php b/src/app/Backends/LDAP.php
--- a/src/app/Backends/LDAP.php
+++ b/src/app/Backends/LDAP.php
@@ -430,6 +430,10 @@
         if (!in_array("groupware", $roles)) {
             $entry['nsroledn'][] = "cn=imap-user,{$hostedRootDN}";
         }
+
+        if (empty($entry['nsroledn'])) {
+            unset($entry['nsroledn']);
+        }
     }
 
     /**
diff --git a/src/app/Domain.php b/src/app/Domain.php
--- a/src/app/Domain.php
+++ b/src/app/Domain.php
@@ -356,16 +356,9 @@
             throw new \Exception("Failed to get DNS record for {$this->namespace}");
         }
 
-        // It may happen that result contains other domains depending on the host
-        // DNS setup
-        $hosts = array_map(
-            function ($record) {
-                return $record['host'];
-            },
-            $records
-        );
-
-        if (in_array($this->namespace, $hosts)) {
+        // It may happen that result contains other domains depending on the host DNS setup
+        // that's why in_array() and not just !empty()
+        if (in_array($this->namespace, array_column($records, 'host'))) {
             $this->status |= Domain::STATUS_VERIFIED;
             $this->save();
 
@@ -380,8 +373,11 @@
      *
      * @return \App\Wallet A wallet object
      */
-    public function wallet(): Wallet
+    public function wallet(): ?Wallet
     {
-        return $this->entitlement()->first()->wallet;
+        // Note: Not all domains have a entitlement/wallet
+        $entitlement = $this->entitlement()->first();
+
+        return $entitlement ? $entitlement->wallet : null;
     }
 }
diff --git a/src/app/Handlers/Activesync.php b/src/app/Handlers/Activesync.php
--- a/src/app/Handlers/Activesync.php
+++ b/src/app/Handlers/Activesync.php
@@ -18,4 +18,9 @@
 
         return true;
     }
+
+    public static function priority(): int
+    {
+        return 70;
+    }
 }
diff --git a/src/app/Handlers/Auth2F.php b/src/app/Handlers/Auth2F.php
--- a/src/app/Handlers/Auth2F.php
+++ b/src/app/Handlers/Auth2F.php
@@ -18,4 +18,9 @@
 
         return true;
     }
+
+    public static function priority(): int
+    {
+        return 60;
+    }
 }
diff --git a/src/app/Http/Controllers/API/V4/Admin/UsersController.php b/src/app/Http/Controllers/API/V4/Admin/UsersController.php
--- a/src/app/Http/Controllers/API/V4/Admin/UsersController.php
+++ b/src/app/Http/Controllers/API/V4/Admin/UsersController.php
@@ -2,16 +2,62 @@
 
 namespace App\Http\Controllers\API\V4\Admin;
 
+use App\Domain;
+use App\User;
+use App\UserSetting;
+
 class UsersController extends \App\Http\Controllers\API\V4\UsersController
 {
+    /**
+     * Searching of user accounts.
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
     public function index()
     {
-        $result = \App\User::orderBy('email')->get()->map(function ($user) {
+        $search = trim(request()->input('search'));
+        $result = collect([]);
+
+        if (strpos($search, '@')) {
+            // Search by email
+            if ($user = User::findByEmail($search, false)) {
+                $result->push($user);
+            } else {
+                // Search by an external email
+                // TODO: This is not optimal (external email should be in users table)
+                $user_ids = UserSetting::where('key', 'external_email')->where('value', $search)
+                    ->get()->pluck('user_id');
+
+                // TODO: Sort order
+                $result = User::find($user_ids);
+            }
+        } elseif (is_numeric($search)) {
+            // Search by user ID
+            if ($user = User::find($search)) {
+                $result->push($user);
+            }
+        } elseif (!empty($search)) {
+            // Search by domain
+            if ($domain = Domain::where('namespace', $search)->first()) {
+                if ($wallet = $domain->wallet()) {
+                    $result->push($wallet->owner);
+                }
+            }
+        }
+
+        // Process the result
+        $result = $result->map(function ($user) {
             $data = $user->toArray();
             $data = array_merge($data, self::userStatuses($user));
             return $data;
         });
 
+        $result = [
+            'list' => $result,
+            'count' => count($result),
+            'message' => \trans('app.search-foundxusers', ['x' => count($result)]),
+        ];
+
         return response()->json($result);
     }
 }
diff --git a/src/app/User.php b/src/app/User.php
--- a/src/app/User.php
+++ b/src/app/User.php
@@ -355,11 +355,12 @@
      * Helper to find user by email address, whether it is
      * main email address, alias or external email
      *
-     * @param string $email Email address
+     * @param string $email    Email address
+     * @param bool   $external Search also by an external email
      *
      * @return \App\User User model object if found
      */
-    public static function findByEmail(string $email): ?User
+    public static function findByEmail(string $email, bool $external = false): ?User
     {
         if (strpos($email, '@') === false) {
             return null;
diff --git a/src/resources/js/fontawesome.js b/src/resources/js/fontawesome.js
--- a/src/resources/js/fontawesome.js
+++ b/src/resources/js/fontawesome.js
@@ -14,6 +14,7 @@
     faLock,
     faKey,
     faPlus,
+    faSearch,
     faSignInAlt,
     faSyncAlt,
     faTrashAlt,
@@ -32,6 +33,7 @@
     faLock,
     faKey,
     faPlus,
+    faSearch,
     faSignInAlt,
     faSquare,
     faSyncAlt,
diff --git a/src/resources/js/routes-admin.js b/src/resources/js/routes-admin.js
--- a/src/resources/js/routes-admin.js
+++ b/src/resources/js/routes-admin.js
@@ -8,6 +8,7 @@
 import LoginComponent from '../vue/Login'
 import LogoutComponent from '../vue/Logout'
 import PasswordResetComponent from '../vue/PasswordReset'
+import UserComponent from '../vue/Admin/User'
 
 import store from './store'
 
@@ -38,6 +39,12 @@
         component: PasswordResetComponent
     },
     {
+        path: '/user/:user',
+        name: 'user',
+        component: UserComponent,
+        meta: { requiresAuth: true }
+    },
+    {
         name: '404',
         path: '*',
         component: Error404Component
diff --git a/src/resources/lang/en/app.php b/src/resources/lang/en/app.php
--- a/src/resources/lang/en/app.php
+++ b/src/resources/lang/en/app.php
@@ -24,4 +24,6 @@
     'user-update-success' => 'User data updated successfully.',
     'user-create-success' => 'User created successfully.',
     'user-delete-success' => 'User deleted successfully.',
+
+    'search-foundxusers' => ':x user accounts have been found.',
 ];
diff --git a/src/resources/vue/Admin/Dashboard.vue b/src/resources/vue/Admin/Dashboard.vue
--- a/src/resources/vue/Admin/Dashboard.vue
+++ b/src/resources/vue/Admin/Dashboard.vue
@@ -1,5 +1,36 @@
 <template>
     <div v-if="!$root.isLoading" class="container" dusk="dashboard-component">
+        <div id="search-box" class="card">
+            <div class="card-body">
+                <form @submit.prevent="searchUser" class="row justify-content-center">
+                    <div class="input-group col-sm-8">
+                        <input class="form-control" type="text" placeholder="User ID, email or domain" v-model="search">
+                        <div class="input-group-append">
+                            <button type="submit" class="btn btn-primary"><svg-icon icon="search"></svg-icon> Search</button>
+                        </div>
+                    </div>
+                </form>
+                <table v-if="users.length" class="table table-sm table-hover mt-4">
+                    <thead class="thead-light">
+                        <tr>
+                            <th scope="col">Primary Email</th>
+                            <th scope="col">ID</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        <tr v-for="user in users" :id="'user' + user.id" :key="user.id">
+                            <td>
+                                <svg-icon icon="user" :class="$root.userStatusClass(user)" :title="$root.userStatusText(user)"></svg-icon>
+                                <router-link :to="{ path: 'user/' + user.id }">{{ user.email }}</router-link>
+                            </td>
+                            <td>
+                                <router-link :to="{ path: 'user/' + user.id }">{{ user.id }}</router-link>
+                            </td>
+                        </tr>
+                    </tbody>
+                </table>
+            </div>
+        </div>
         <div id="dashboard-nav"></div>
     </div>
 </template>
@@ -8,25 +39,45 @@
     export default {
         data() {
             return {
-                isReady: true
+                search: '',
+                users: []
             }
         },
         mounted() {
             const authInfo = this.$store.state.isLoggedIn ? this.$store.state.authInfo : null
 
             if (authInfo) {
-
+                $('#search-box input').focus()
             } else {
                 this.$root.startLoading()
                 axios.get('/api/auth/info')
                     .then(response => {
                         this.$store.state.authInfo = response.data
                         this.$root.stopLoading()
+                        setTimeout(() => { $('#search-box input').focus() }, 10)
                     })
                     .catch(this.$root.errorHandler)
             }
         },
         methods: {
+            searchUser() {
+                this.users = []
+
+                axios.get('/api/v4/users', { params: { search: this.search } })
+                    .then(response => {
+                        if (response.data.count == 1) {
+                            this.$router.push({ name: 'user', params: { user: response.data.list[0].id } })
+                            return
+                        }
+
+                        if (response.data.message) {
+                            this.$toastr('info', response.data.message)
+                        }
+
+                        this.users = response.data.list
+                    })
+                    .catch(this.$root.errorHandler)
+            }
         }
     }
 </script>
diff --git a/src/resources/vue/Admin/User.vue b/src/resources/vue/Admin/User.vue
new file mode 100644
--- /dev/null
+++ b/src/resources/vue/Admin/User.vue
@@ -0,0 +1,107 @@
+<template>
+    <div class="container">
+        <div class="card" id="user-info">
+            <div class="card-body">
+                <div class="card-title">{{ user.email }}</div>
+                <div class="card-text">
+                    <form @submit.prevent="submit">
+                        <div class="form-group row mb-0">
+                            <label for="first_name" class="col-sm-4 col-form-label">Status</label>
+                            <div class="col-sm-8">
+                                <span :class="$root.userStatusClass(user) + ' form-control-plaintext'" id="status">{{ $root.userStatusText(user) }}</span>
+                            </div>
+                        </div>
+                        <div class="form-group row mb-0" v-if="user.first_name">
+                            <label for="first_name" class="col-sm-4 col-form-label">First name</label>
+                            <div class="col-sm-8">
+                                <span class="form-control-plaintext" id="first_name">{{ user.first_name }}</span>
+                            </div>
+                        </div>
+                        <div class="form-group row mb-0" v-if="user.last_name">
+                            <label for="last_name" class="col-sm-4 col-form-label">Last name</label>
+                            <div class="col-sm-8">
+                                <span class="form-control-plaintext" id="last_name">{{ user.last_name }}</span>
+                            </div>
+                        </div>
+                        <div class="form-group row mb-0" v-if="user.phone">
+                            <label for="phone" class="col-sm-4 col-form-label">Phone</label>
+                            <div class="col-sm-8">
+                                <span class="form-control-plaintext" id="phone">{{ user.phone }}</span>
+                            </div>
+                        </div>
+                        <div class="form-group row mb-0">
+                            <label for="external_email" class="col-sm-4 col-form-label">External email</label>
+                            <div class="col-sm-8">
+                                <span class="form-control-plaintext" id="external_email">{{ user.external_email }}</span>
+                            </div>
+                        </div>
+                        <div class="form-group row mb-0" v-if="user.billing_address">
+                            <label for="billing_address" class="col-sm-4 col-form-label">Address</label>
+                            <div class="col-sm-8">
+                                <span class="form-control-plaintext" style="white-space:pre" id="billing_address">{{ user.billing_address }}</span>
+                            </div>
+                        </div>
+                        <div class="form-group row mb-0">
+                            <label for="country" class="col-sm-4 col-form-label">Country</label>
+                            <div class="col-sm-8">
+                                <span class="form-control-plaintext" id="country">{{ user.country }}</span>
+                            </div>
+                        </div>
+                    </form>
+                </div>
+            </div>
+        </div>
+    </div>
+</template>
+
+<script>
+    export default {
+        data() {
+            return {
+                discount: 0,
+                discount_description: '',
+                user: {},
+                skus: []
+            }
+        },
+        created() {
+            let user_id = this.$route.params.user
+
+            this.$root.startLoading()
+
+            axios.get('/api/v4/users/' + user_id)
+                .then(response => {
+                    this.user = response.data
+
+                    let keys = ['first_name', 'last_name', 'external_email', 'billing_address']
+                    let country = this.user.settings.country
+
+                    if (country) {
+                        this.user.country = window.config.countries[country][1]
+                    }
+
+                    keys.forEach(key => { this.user[key] = this.user.settings[key] })
+
+                    this.discount = this.user.wallet.discount
+                    this.discount_description = this.user.wallet.discount_description
+
+                    this.$root.stopLoading()
+                })
+                .catch(this.$root.errorHandler)
+        },
+        mounted() {
+        },
+        methods: {
+            price(cost, units = 1) {
+                let index = ''
+
+                if (this.discount) {
+                    cost = Math.floor(cost * ((100 - this.discount) / 100))
+                    index = '\u00B9'
+                }
+
+                return this.$root.price(cost * units) + '/month' + index
+            }
+        }
+    }
+</script>
diff --git a/src/tests/Browser/Admin/DashboardTest.php b/src/tests/Browser/Admin/DashboardTest.php
new file mode 100644
--- /dev/null
+++ b/src/tests/Browser/Admin/DashboardTest.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Tests\Browser\Admin;
+
+use Tests\Browser;
+use Tests\Browser\Components\Toast;
+use Tests\Browser\Pages\Dashboard;
+use Tests\Browser\Pages\Home;
+use Tests\TestCaseDusk;
+use Illuminate\Foundation\Testing\DatabaseMigrations;
+
+class DashboardTest extends TestCaseDusk
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function setUp(): void
+    {
+        parent::setUp();
+        self::useAdminUrl();
+
+        $jack = $this->getTestUser('jack@kolab.org');
+        $jack->setSetting('external_email', null);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function tearDown(): void
+    {
+        $jack = $this->getTestUser('jack@kolab.org');
+        $jack->setSetting('external_email', null);
+
+        parent::tearDown();
+    }
+
+    /**
+     * Test user search
+     */
+    public function testSearch(): void
+    {
+        $this->browse(function (Browser $browser) {
+            $browser->visit(new Home())
+                ->submitLogon('jeroen@jeroen.jeroen', 'jeroen', true)
+                ->on(new Dashboard())
+                ->assertFocused('@search input')
+                ->assertMissing('@search table');
+
+            // Test search with no results
+            $browser->type('@search input', 'unknown')
+                ->click('@search form button')
+                ->assertToast(Toast::TYPE_INFO, '', '0 user accounts have been found.')
+                ->assertMissing('@search table');
+
+            $john = $this->getTestUser('john@kolab.org');
+            $jack = $this->getTestUser('jack@kolab.org');
+            $jack->setSetting('external_email', 'john.doe.external@gmail.com');
+
+            // Test search with multiple results
+            $browser->type('@search input', 'john.doe.external@gmail.com')
+                ->click('@search form button')
+                ->assertToast(Toast::TYPE_INFO, '', '2 user accounts have been found.')
+                ->whenAvailable('@search table', function (Browser $browser) {
+                    $browser->assertElementsCount('tbody tr', 2);
+                    // TODO: Assert table content
+                });
+
+            // Test search with single record result -> redirect to user page
+            $browser->type('@search input', 'kolab.org')
+                ->click('@search form button')
+                ->assertMissing('@search table')
+                ->waitForLocation('/user/' . $john->id)
+                ->waitFor('#user-info')
+                ->assertVisible('#user-info .card-title', $john->email);
+        });
+    }
+}
diff --git a/src/tests/Browser/Admin/LogonTest.php b/src/tests/Browser/Admin/LogonTest.php
--- a/src/tests/Browser/Admin/LogonTest.php
+++ b/src/tests/Browser/Admin/LogonTest.php
@@ -18,11 +18,7 @@
     public function setUp(): void
     {
         parent::setUp();
-
-        // This will set baseURL for all tests in this file
-        // If we wanted to visit both user and admin in one test
-        // we can also just call visit() with full url
-        Browser::$baseUrl = str_replace('//', '//admin.', \config('app.url'));
+        self::useAdminUrl();
     }
 
     /**
diff --git a/src/tests/Browser/Pages/Dashboard.php b/src/tests/Browser/Pages/Dashboard.php
--- a/src/tests/Browser/Pages/Dashboard.php
+++ b/src/tests/Browser/Pages/Dashboard.php
@@ -52,6 +52,7 @@
             '@app' => '#app',
             '@links' => '#dashboard-nav',
             '@status' => '#status-box',
+            '@search' => '#search-box',
         ];
     }
 }
diff --git a/src/tests/Browser/UsersTest.php b/src/tests/Browser/UsersTest.php
--- a/src/tests/Browser/UsersTest.php
+++ b/src/tests/Browser/UsersTest.php
@@ -261,25 +261,25 @@
                                 'tbody tr:nth-child(3) td.buttons button',
                                 'Groupware functions like Calendar, Tasks, Notes, etc.'
                             )
-                            // 2FA SKU
-                            ->assertSeeIn('tbody tr:nth-child(4) td.name', '2-Factor Authentication')
-                            ->assertSeeIn('tbody tr:nth-child(4) td.price', '0,00 CHF/month')
+                            // ActiveSync SKU
+                            ->assertSeeIn('tbody tr:nth-child(4) td.name', 'Activesync')
+                            ->assertSeeIn('tbody tr:nth-child(4) td.price', '1,00 CHF/month')
                             ->assertNotChecked('tbody tr:nth-child(4) td.selection input')
                             ->assertEnabled('tbody tr:nth-child(4) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(4) td.buttons button',
-                                'Two factor authentication for webmail and administration panel'
+                                'Mobile synchronization'
                             )
-                            // ActiveSync SKU
-                            ->assertSeeIn('tbody tr:nth-child(5) td.name', 'Activesync')
-                            ->assertSeeIn('tbody tr:nth-child(5) td.price', '1,00 CHF/month')
+                            // 2FA SKU
+                            ->assertSeeIn('tbody tr:nth-child(5) td.name', '2-Factor Authentication')
+                            ->assertSeeIn('tbody tr:nth-child(5) td.price', '0,00 CHF/month')
                             ->assertNotChecked('tbody tr:nth-child(5) td.selection input')
                             ->assertEnabled('tbody tr:nth-child(5) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(5) td.buttons button',
-                                'Mobile synchronization'
+                                'Two factor authentication for webmail and administration panel'
                             )
-                            ->click('tbody tr:nth-child(5) td.selection input');
+                            ->click('tbody tr:nth-child(4) td.selection input');
                     })
                     ->assertMissing('@skus table + .hint')
                     ->click('button[type=submit]');
@@ -561,10 +561,10 @@
                             ->assertSeeIn('tr:nth-child(2) td.price', '21,56 CHF/month¹')
                             // groupware SKU
                             ->assertSeeIn('tbody tr:nth-child(3) td.price', '4,99 CHF/month¹')
-                            // 2FA SKU
-                            ->assertSeeIn('tbody tr:nth-child(4) td.price', '0,00 CHF/month¹')
                             // ActiveSync SKU
-                            ->assertSeeIn('tbody tr:nth-child(5) td.price', '0,90 CHF/month¹');
+                            ->assertSeeIn('tbody tr:nth-child(4) td.price', '0,90 CHF/month¹')
+                            // 2FA SKU
+                            ->assertSeeIn('tbody tr:nth-child(5) td.price', '0,00 CHF/month¹');
                     })
                     ->assertSeeIn('@skus table + .hint', '¹ applied discount: 10% - Test voucher');
                 });
diff --git a/src/tests/Feature/Controller/Admin/UsersTest.php b/src/tests/Feature/Controller/Admin/UsersTest.php
--- a/src/tests/Feature/Controller/Admin/UsersTest.php
+++ b/src/tests/Feature/Controller/Admin/UsersTest.php
@@ -2,8 +2,6 @@
 
 namespace Tests\Feature\Controller\Admin;
 
-use App\Domain;
-use App\User;
 use Tests\TestCase;
 
 class UsersTest extends TestCase
@@ -14,11 +12,10 @@
     public function setUp(): void
     {
         parent::setUp();
+        self::useAdminUrl();
 
-        // This will set base URL for all tests in this file
-        // If we wanted to access both user and admin in one test
-        // we can also just call post/get/whatever with full url
-        \config(['app.url' => str_replace('//', '//admin.', \config('app.url'))]);
+        $jack = $this->getTestUser('jack@kolab.org');
+        $jack->setSetting('external_email', null);
     }
 
     /**
@@ -26,24 +23,101 @@
      */
     public function tearDown(): void
     {
+        $jack = $this->getTestUser('jack@kolab.org');
+        $jack->setSetting('external_email', null);
+
         parent::tearDown();
     }
 
     /**
-     * Test (/api/v4/index)
+     * Test users searching (/api/v4/users)
      */
     public function testIndex(): void
     {
         $user = $this->getTestUser('john@kolab.org');
         $admin = $this->getTestUser('jeroen@jeroen.jeroen');
 
+        // Non-admin user
         $response = $this->actingAs($user)->get("api/v4/users");
         $response->assertStatus(403);
 
+        // Search with no search criteria
         $response = $this->actingAs($admin)->get("api/v4/users");
         $response->assertStatus(200);
 
-        // TODO: Test the response
-        $this->markTestIncomplete();
+        $json = $response->json();
+
+        $this->assertSame(0, $json['count']);
+        $this->assertSame([], $json['list']);
+
+        // Search with no matches expected
+        $response = $this->actingAs($admin)->get("api/v4/users?search=abcd1234efgh5678");
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertSame(0, $json['count']);
+        $this->assertSame([], $json['list']);
+
+        // Search by domain
+        $response = $this->actingAs($admin)->get("api/v4/users?search=kolab.org");
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertSame(1, $json['count']);
+        $this->assertCount(1, $json['list']);
+        $this->assertSame($user->id, $json['list'][0]['id']);
+        $this->assertSame($user->email, $json['list'][0]['email']);
+
+        // Search by user ID
+        $response = $this->actingAs($admin)->get("api/v4/users?search={$user->id}");
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertSame(1, $json['count']);
+        $this->assertCount(1, $json['list']);
+        $this->assertSame($user->id, $json['list'][0]['id']);
+        $this->assertSame($user->email, $json['list'][0]['email']);
+
+        // Search by email (primary)
+        $response = $this->actingAs($admin)->get("api/v4/users?search=john@kolab.org");
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertSame(1, $json['count']);
+        $this->assertCount(1, $json['list']);
+        $this->assertSame($user->id, $json['list'][0]['id']);
+        $this->assertSame($user->email, $json['list'][0]['email']);
+
+        // Search by email (alias)
+        $response = $this->actingAs($admin)->get("api/v4/users?search=john.doe@kolab.org");
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertSame(1, $json['count']);
+        $this->assertCount(1, $json['list']);
+        $this->assertSame($user->id, $json['list'][0]['id']);
+        $this->assertSame($user->email, $json['list'][0]['email']);
+
+        // Search by email (external), expect two users in a result
+        $jack = $this->getTestUser('jack@kolab.org');
+        $jack->setSetting('external_email', 'john.doe.external@gmail.com');
+
+        $response = $this->actingAs($admin)->get("api/v4/users?search=john.doe.external@gmail.com");
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertSame(2, $json['count']);
+        $this->assertCount(2, $json['list']);
+
+        $emails = array_column($json['list'], 'email');
+
+        $this->assertContains($user->email, $emails);
+        $this->assertContains($jack->email, $emails);
     }
 }
diff --git a/src/tests/TestCase.php b/src/tests/TestCase.php
--- a/src/tests/TestCase.php
+++ b/src/tests/TestCase.php
@@ -16,4 +16,15 @@
             $entitlement->save();
         }
     }
+
+    /**
+     * Set baseURL to the admin UI location
+     */
+    protected static function useAdminUrl(): void
+    {
+        // This will set base URL for all tests in a file.
+        // If we wanted to access both user and admin in one test
+        // we can also just call post/get/whatever with full url
+        \config(['app.url' => str_replace('//', '//admin.', \config('app.url'))]);
+    }
 }
diff --git a/src/tests/TestCaseDusk.php b/src/tests/TestCaseDusk.php
--- a/src/tests/TestCaseDusk.php
+++ b/src/tests/TestCaseDusk.php
@@ -33,7 +33,6 @@
             '--lang=en_US',
             '--disable-gpu',
             '--headless',
-            '--window-size=1280,720',
         ]);
 
         // For file download handling
@@ -57,7 +56,7 @@
             $options->setExperimentalOption('mobileEmulation', ['userAgent' => $ua]);
             $options->addArguments(['--window-size=800,640']);
         } else {
-            $options->addArguments(['--window-size=1280,720']);
+            $options->addArguments(['--window-size=2560,1440']);
         }
 
         // Make sure downloads dir exists and is empty
@@ -85,4 +84,15 @@
     {
         return new Browser($driver);
     }
+
+    /**
+     * Set baseURL to the admin UI location
+     */
+    protected static function useAdminUrl(): void
+    {
+        // This will set baseURL for all tests in this file
+        // If we wanted to visit both user and admin in one test
+        // we can also just call visit() with full url
+        Browser::$baseUrl = str_replace('//', '//admin.', \config('app.url'));
+    }
 }